`torch_stable.html` wheel index is not PEP 503 compliant

[chrisantonellis]

the torch_stable.html index of wheels does not match the spec for a "simple index"

https://download.pytorch.org/whl/cu100/torch_stable.html

I propose modifying the html generation script here (https://github.com/pytorch/builder/blob/master/cron/update_s3_htmls.sh) to output a /simple directory with the correct file structure structure is generated in addition to the top level torch_stable.html, linking back to the top level wheel files.

https://www.python.org/dev/peps/pep-0503/
https://packaging.python.org/guides/hosting-your-own-index/

if pip was aware of the valid torch index, builds with local identifiers could be installed without including the html url

[chrisantonellis]

I would be happy to contribute to this issue as part of hacktoberfest! can someone add the hacktoberfest label so I can get credit? Thank you!

[soumith]

cc: @seemethere

[chrisantonellis]

@soumith @seemethere any interest in my working on this? Thank You!

[seemethere]

Yup that'd be awesome!

If you submit a PR I'll label it with a hacktoberfest-accepted label

[chrisantonellis]

on it !